Top lighting and interlighting luminaire assembly with movable light source

ABSTRACT

A lighting system includes a light source, a light redirection element, and a movement mechanism coupled to the light source and the light redirection element. The movement mechanism is configured to simultaneously or stepwise move the light source and the light redirection element between a top lighting position and an interlighting position.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of U.S. Provisional PatentApplication No. 63/173,567 which was filed on Apr. 12, 2021.

FIELD

Embodiments of the present disclosure generally relate to greenhouselighting fixtures or luminaires. More particularly, embodiments relateto an improved greenhouse fixture or luminaire that is capable ofproviding both top and interlighting.

BACKGROUND

Greenhouses (or other interior growing locations) commonly useartificial supplemental light to encourage or promote plant growth.Plants such as vine crops or other large and/or tall plants are oftencultivated within greenhouses, and artificial lighting is typicallyemployed to direct light upon the plants to stimulate growth.Horticultural lighting in the form of luminaires are typically mountedto or suspended from (e.g., by cables) the roof or ceiling of thegreenhouse. Top lighting is often used to direct light from above upontop surfaces and other horizontal surfaces of the plant canopy, andinterlighting is sometimes used to direct light upon lateral surfaces ofthe plant or inside the plant canopy during different stages of growth.

The best location to place a luminaire in an interlighting arrangementis often in the aisle of the greenhouse in which an operator must work.This may, unfortunately, result in obstruction of the operator'smovement. Another manner of interlighting is to place the luminairewithin the plant canopy. Unfortunately, this presents challenges inpreventing the leaves of the plant from burning due to high energydensity of the light emitted from the luminaire. Another challenge thatarises with top lighting is that it often can only be used during aportion of the year because the sun may already irradiate the top of theplants during portions of the year such as during summer. Additionally,top lighting can generate sun light shadow that result in reduction ofgrowth in summer season.

Accordingly, it would be beneficial to develop luminaires capable ofselective top lighting or interlighting, as desired, to solve the aboveproblems.

BRIEF DESCRIPTION

Pursuant to some embodiments, a lighting system includes a light source,a light redirection element, and a movement mechanism coupled to thelight source and the light redirection element. The movement mechanismis configured to simultaneously or stepwise move the light source andthe light redirection element between a top lighting position and aninterlighting position.

In one aspect, embodiments of the present disclosure relates to aluminaire or lighting system that includes a light source, a lightredirection element, and a movement mechanism coupled to the lightsource and the light redirection element. The movement mechanism isconfigured to simultaneously or stepwise move the light source at afirst vertical movement rate and the light redirection element at asecond vertical movement rate. The movement mechanism is furtherconfigured to position, at a first time, the light source at a firstvertical position and position the light redirection element at a firstvertical distance from the light source to direct light from the lightsource to an object at a first emission direction. The movementmechanism is further configured to position, at second time, the lightsource at a second vertical position and position the light redirectionelement at a second vertical distance from the light source to directlight from the light source to the object at a second emission directionusing the light redirection element.

In another aspect, embodiments of the present invention related to amethod for top lighting and interlighting using a luminaire assembly.The method comprises simultaneously or stepwise moving, by a movementmechanism, a light source at a first vertical movement rate and a lightredirection element at a second vertical movement rate. The movementmechanism is separately coupled to the light source and the lightredirection element. The method further comprises positioning, at afirst time, the light source at a first vertical position and the lightredirection element at a first vertical distance from the light sourceto direct light from the light source to an object at a first emissiondirection. The method yet further comprises positioning, at second time,the light source at a second vertical position and the light redirectionelement at a second vertical distance from the light source to directlight from the light source to the object at a second emission directionusing the light redirection element.

DRAWINGS

These and other features, aspects, and advantages of the presentdisclosure will become better understood when the following detaileddescription is read with reference to the accompanying drawings in whichlike characters represent like parts throughout the drawings, wherein:

FIG. 1A is a view of a lighting system in which a luminaire ispositioned in a first configuration in accordance with an embodiment ofthe present invention.

FIG. 1B is a further view of a lighting system in which a luminaire ispositioned in a second configuration in accordance with an embodiment ofthe present invention.

FIG. 2A is an illustration of a beam pattern of a light source of theluminaire of FIG. 1A.

FIG. 2B is an illustration of a beam pattern of a light source of theluminaire of FIG. 1B.

FIGS. 3A and 3B are views of movement mechanisms pursuant to someembodiments.

FIGS. 4A & 4B are views of some components of a luminaire pursuant tosome embodiments.

FIG. 5 is a flowchart illustrating a method for top lighting andinterlighting using a luminaire assembly with a movable light source inaccordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION

In an effort to provide a concise description of these embodiments, notall features of an actual implementation are described in one or morespecific embodiments. It should be appreciated that in the developmentof any such actual implementation, as in any engineering or designproject, numerous implementation-specific decisions must be made toachieve the developers' specific goals, such as compliance withsystem-related and business-related constraints, which may vary from oneimplementation to another. Moreover, it should be appreciated that sucha development effort would nevertheless be a routine undertaking ofdesign, fabrication, and manufacture for those of ordinary skill havingthe benefit of the present disclosure.

Unless defined otherwise, technical and scientific terms used hereinhave the same meaning as is commonly understood by one of ordinary skillin the art to which the present disclosure belongs. The terms “first,”“second,” “third,” “fourth,” and the like, as used herein do not denoteany order, quantity, or importance, but rather are used to distinguishone element from another. Also, the terms “a” and “an” do not denote alimitation of quantity, but rather denote the presence of at least oneof the referenced items. The term “or” is meant to be inclusive and meaneither any, several, or all of the listed items. The use of “including,”“comprising,” or “having,” and variations thereof herein are meant toencompass the items listed thereafter and equivalents thereof as well asadditional items.

Embodiments of the present disclosure relate to a top lighting andinterlighting luminaire assembly with movable light source for interiorplant growth stimulation.

FIG. 1A illustrates a greenhouse 100 of any conventional construction.As used herein, the term “greenhouse” is generally used to refer to anybuilding, facility, structure or portion thereof used to grow plantstherein. The greenhouse 100 includes a roof 102 and frame structure 104.A plurality of luminaires 108 (although only one is shown in FIG. 1A, ina typical installation, multiple luminaires 108 may be used) inaccordance with various embodiments of the present disclosure aresuspended from the frame structure 104 (or from a ceiling or roof) ofthe greenhouse 100. The luminaire 108 may be suspended, hung or attachedto the frame structure 104 at a mounting mechanism 120 by anyconventional suspension element, such as chains, cables, hoist systemsor the like. In some embodiments, rather than being suspended orattached to a frame structure 104, some or all of the luminaires 108 ina greenhouse 100 may be mounted or attached to risers, scaffolds orother elements designed to position the luminaires 108 above one or morerows of plants so that the luminaires 108 may be operated as describedfurther herein. As used herein, the term “luminaire” is used togenerally refer to a lighting unit or fixture that includes one or morelamps to distribute the light, to position and protect the lamps, and toconnect the lamps to a power supply. For example, in some embodiments,the luminaires 108 include light emitting diode (“LED”) lamps that emitlight in order to promote plant growth. In some embodiments, theluminaires 108 may include lamps other than LED lamps.

In general, a luminaire 108 pursuant to some embodiments may include amovement mechanism 110, a light source 130 and a light redirectionelement 140. In practical application, a greenhouse 100 may include aplurality of luminaires 108. Further, in some embodiments, some or allof the luminaires 108 may include one or more movement mechanisms 110,light sources 130 and light redirection elements 140. Pursuant to someembodiments, the luminaire 108 (and individual components thereof asdescribed further herein) may be adjustable in height relative to theroof 102 or frame structure 104 so that the luminaire 108 can beadjusted to accommodate increased height of the plants 190 duringvarious growth phases of the plants 190 as well as to selectively andadjustably provide top lighting or interlighting as desired. Moreparticularly, pursuant to some embodiments of the present invention, themovement mechanism 110 may be operated to control the position of thelight source 130 as well as the position of the light redirectionelement 140.

Pursuant to some embodiments, a mounting mechanism 120 is provided tomount each movement mechanism 110 to the roof 102 or to a framestructure 104. In the illustrated embodiment, the greenhouse 100 formsan interior environment for growing plants. It should be appreciatedthat the greenhouse 100 is not limited to any particular framestructure, construction or the like and that plants grown in anyinterior location may benefit from the luminaires of the presentinvention.

As shown in FIG. 1A, the interior of the greenhouse 100 includes a firstbase 170A supporting a first planter 180A, and a second base 170Bsupporting a second planter 180B. The first planter 180A includes afirst set of plants 190A planted therein, and the second planter 180Bincludes a second set of plants 190B planted therein. In a particularembodiment, the first set of plants 190A and the second set of plants190B includes one or more plants in rows. The plants may be any varietyof plant or crop grown indoors, such as vegetables, fruits, cannabis, orthe like. In practical application, a greenhouse 100 may include aplurality of rows of plants 190 (and a plurality of luminaires 108pursuant to the present invention to provide top and interlighting tothose plants as described herein).

In the view depicted in FIG. 1A, the luminaire 108 is positionedrelatively near the top of the plants 190 (relative to the position ofthe luminaire 108 as shown in FIG. 1B, where the luminaire 108 ispositioned lower). Further, in the view depicted in FIG. 1A, the lightsource 130 and the light redirection element 140 are positioned suchthat they are spaced apart so that the light emitted from the lightsource 130 is directed in a substantially downward direction (e.g., suchthat the light is generally directed downward at a top of the plants190).

The light source 130 may include one or more light sources. In someembodiments, the one or more light sources include one or more lightemitting diode (LED) modules. For example, each luminaire 108 mayinclude one or more light sources 130 which extend along a length of theluminaire 108. Each light source 130 may include one or more LED lightmodules that include one or more spaced apart LEDs that extend along alongitudinal axis of the luminaire 108. Embodiments are not limited toany particular type of light source or LED, and may be, for example,high output LEDs, low power LEDs, a combination of multiple LEDs of thesame or different wavelengths, or the like. The light source 130 may beprovided in the form of an LED light strip, LED tube light, or any otherconfiguration. While not shown in FIG. 1, the luminaire 108 may alsoinclude one or more optical elements and/or a cover. In general, thelight source 130 is configured to emit light in a pattern and directionsuch as the first emission direction 160A of FIG. 1A.

The luminaire 108 also includes a light redirection element 140 which iscoupled to the movement mechanism 110 (e.g., via a cable, chain, or thelike). In general, both the light source 130 and the light redirectionelement 140 may be selectively positioned by operation of the movementmechanism 110. In one position, such as the position illustrated in FIG.1A, the light redirection element 140 is positioned a distance apartfrom the light source such that the light emitted by the light source130 is generally not direct toward (or redirected by) the lightredirection element 140. That is, the movement mechanism 110 has causedthe light redirection element 140 to be positioned a distance apart fromthe light source 130 so that the light source 130 can operate in a toplight mode of operation as shown in FIG. 1A. A beam pattern 200 of thelight emitted from the light source 130 is illustrated in FIG. 2A. Asshown in FIG. 2A, the beam pattern 200 is substantially in a downwarddirection from the light source 130 (while the light source 130 is notshown in FIG. 2A, the light source is generally positioned at theintersection of the X and Y-axes of the beam pattern 200).

The movement mechanism 110 is coupled to each of the light source 130and the light redirection element 140 and in some embodiments isconfigured to move the light source 130 at a first vertical movementrate and the light redirection element 140 at a second vertical movementrate in an upward or downward direction. For example, in someembodiments, the movement mechanism 110 is configured to substantiallysimultaneously move the light source 130 and the light redirectionelement 140 so that the light source 130 and the light redirectionelement 140 may be repositioned from a first position (e.g., such as atop light position or configuration or an interlighting position orconfiguration) to a second position.

In some embodiments, the first vertical movement rate is greater thanthe second vertical movement rate such that the light source 130 movesin the same vertical direction but in a greater vertical distance thanthe light redirection element 140. In some embodiments, the movementmechanism 110 is coupled to each of the light source 130 and the lightredirection element 140 via one or more cables or chains.

In one or more embodiments, the light source 130 is configured to emitlight in a substantially downward direction towards the lightredirection element 140, and light redirection element 140 is configuredto receive light emitted in the substantially downward direction andredirect the light in a substantially lateral second direction. Inparticular embodiments, the light redirection element 140 includes oneor more of a reflector or a lens. In still other particular embodiments,the lens may be a total internal reflection (TIR) lens.

The movement mechanism 110 is further configured to position, at a firsttime, the light source 130 at a first vertical position 150A andposition the light redirection element 140 at a first vertical distancefrom the light source to direct light from the light source to one ormore of the first set of plants 190A and the second set of plants 190Bat a first emission direction 160A. In the illustrated embodiment, theluminaire 108 is configured in a top lighting configuration in which asubstantial portion (e.g., major portion) of the light emitting by thelight source of light source 130 is not redirected by light redirectionelement 140 but instead falls upon one or more top surfaces of the firstset of plants 190A and the second set of plants 190B.

The movement mechanism 110 is further configured to position, at secondtime, the light source of light source 130 at a second vertical position150B and position the light redirection element 140 at a second verticaldistance from the light source to direct light from the light source ofthe light source 130 to one or more of the first set of plants 190A andthe second set of plants 190B at a second emission direction 160B usingthe light redirection element 140. In the illustrated embodiment, theluminaire 108 is configured in an interlighting configuration in which asubstantial portion (e.g., a major portion) emitted by the light sourceof light source 130 is redirected by light redirection element 140 inthe second emission direction 160B to fall upon lateral sides of one ormore of the first set of plants 190A and the second set of plants 190B.

Pursuant to some embodiments, the movement mechanism 110 may be operatedto move or position the light source 130 and the light redirectionelement 140 substantially simultaneously. In some embodiments, the lightsource 130 and the light redirection element 140 may be moved orrepositioned in a stepwise fashion. In general, embodiments allow themovement of both the light source 130 and the light redirection element140 to cause them to be positioned in a desired manner of operation(e.g., substantially in a top light manner of operation, substantiallyin an interlighting manner of operation, or somewhere in between) todeliver light to plants in a greenhouse as described herein.

In accordance with one or more embodiments, light source 130 may bepositioned in any desired vertical position along the first set ofplants 190A and the second set of plants 190B to achieve a desireddistance between light source 130 and light redirection element 140provide top lighting, interlighting, or a desired combination of toplighting and interlighting to the first set of plants 190A and thesecond set of plants 190B. Although various embodiments are described asdirecting light emitted from luminaire 108 onto one or more of the firstset of plants 190A and the second set of plants 190B, it should beunderstood that in other embodiments the light emitted from luminaire108 may be directed upon any desired object or set of objects.

Reference is now made to FIG. 1B where the greenhouse 100 is againdepicted with sets of plants 190A and 190B. In the embodiment depictedin FIG. 1B, the luminaire 108 has been positioned into an interlightingposition. More particularly, the light source 130 and the lightredirection element 140 are positioned lower (nearer the base of theplants 190A, 190B). Further, the light redirection element 140 ispositioned closer to the light source 130 such that the light emittedfrom the light source 130 is redirected towards the plants 190A, 190B(as shown by the arrows indicating the second emission direction 160B).Pursuant to some embodiments, to reposition the light source 130 and thelight redirection element 140 from the position of FIG. 1A to theposition of FIG. 1B, the movement mechanism 110 was operated to causethe light source 130 and the light redirection element 140 to be lowered(although the light redirection element 140 was lowered at a slowerspeed or pace than the light source 130).

FIG. 2B depicts an illustrative cross sectional view of the beam patternof the light emitted from the light source 130 positioned as shown inFIG. 1B. As shown in FIG. 2B, the beam pattern is substantiallyhorizontal (towards the plants in FIG. 1B). The lesser distance from thelight source 130 and the light redirection element 140 results in adifferent light redirection ration as compared to the beam pattern ofFIG. 1A. In the case where the luminaire 108 is positioned as shown inFIG. 1B, the decreased distance between the light source 130 and thelight redirection element 140 has a greater impact on the beam patternthan the position of FIG. 1A. Those skilled in the art, upon reading thepresent disclosure, will appreciate that the distance between the lightsource 130 and the light redirection element 140 may be controlled toselectively produce different beam patterns. Further the relative height(as compared to the plants 190A, 190B) may also be controlled toselectively produce different top or interlighting characteristics. Bycontrolling both the height of the luminaire 108 as well as the distancebetween the light source 130 and the light redirection element 140,embodiments provide a previously unattainable level of control on thedelivery of light to different plant areas.

FIG. 3A is a view of a movement mechanism 300 for the luminaire 108 inaccordance with some embodiments. The movement mechanism 300 is anexample of the movement mechanism 110 of FIGS. 1A and 1B. The movementmechanism 300 includes a control system 380 operatively connected via awired or wireless interface 390 to one or more motors 310. The motor 310has a shaft 320 coupled to the motor 310. The movement mechanism 300further includes a first wheel 330 coupled to the shaft 320. The firstwheel 330 is further coupled to the light source 130 by a first cable340. In the illustrated embodiment, an end of the first cable 340 iscoupled to the light source 130 and a portion of the first cable 340 iswound around a portion of the first wheel 330.

The movement mechanism 300 further includes a second wheel 350 coupledto the shaft 320. The second wheel 350 is further coupled to the lightredirection element 140 by a second cable 360. In the illustratedembodiment, an end of the second cable 360 is coupled to the lightredirection element 140 and a portion of the second cable 360 is woundaround a portion of the second wheel 350. In a particular embodiment, adiameter of the first wheel 330 is greater than a diameter of the secondwheel 350. During rotation of shaft 320 by motor 310, first wheel 330and second wheel 350 are rotated to provide a first vertical movementrate of light source 130 that is greater than a second vertical movementrate of the light redirection element 140. For example, the movementmechanism 300 may be operated to selectively position the light source130 and the light redirection element 140 in positions such as thoseshown in FIGS. 1A and 1B.

Although the embodiment illustrated in FIG. 3A is shown as using asingle motor, it should be understood that in other embodiments one ormore motors and shafts may be used. In some embodiments, the movementmechanism 300 may be operated using a control system 380 which allows anoperator to selectively position the light source 130 and the lightredirection element 140. While the first cable 340 and second cable 360are referred to as “cables”, they may instead or additionally be formedfrom chains, ropes, belts, wires or the like.

Reference is now made to FIG. 3B where a further embodiment of amovement mechanism 300 pursuant to some embodiments is shown. Asdepicted, the movement mechanism 300 includes a control system 380operatively connected via a wired or wireless interface 390 to a firstmotor 312 and a second motor 314, where the first motor 312 includes adrive shaft 322 and a drive wheel 332 which is connected to a firstcable 342 that is connected to the light source 130. In the exampleembodiment depicted in FIG. 3B, the first cable 342 loops through anattachment point 346 on or attached the light source 130 and the firstcable 342 is connected at one end 344 to the second motor 314 at a fixedposition such that when the first motor 312 extends or retracts thefirst cable 342, the light source 130 lowers or raises. As shown in theillustrative example of FIG. 3B, the second motor 314 is connected tothe light redirection element 140 via a second cable 362. In thedepicted embodiment, the second cable 362 is routed through a via orrecess in the light source 130. Pursuant to some embodiments, both thefirst motor 312 and the second motor 314 may be controlled by a controlsystem 380 to selectively position the light source 130 and the lightredirection element 140.

Those skilled in the art, upon reading the present disclosure, willappreciate that other types of movement mechanisms 300 may be used tocontrol the positioning of the components of the luminaire 108 of thepresent invention. In some embodiments, the control system 380 may beprogrammed or configured to selectively position a plurality of lightsources 130 and light redirection elements 140 in a greenhouse such thatall (or a plurality) of the luminaires 108 are positioned in either atop lighting or interlighting mode of operation. In some embodiments, anoperator may interact with the control system 380 to perform thepositioning. In some embodiments, the control system 380 may beconfigured to substantially automatically perform the positioning.

FIGS. 4A & 4B are views of portions of a luminaire 108 pursuant to someembodiments of the present invention and illustrate different lightredirection element configurations pursuant to some embodiments. Forexample, FIG. 4A illustrates an embodiment of a luminaire 400 having alight redirection element 410 in the form of a reflector coupled to alight source 130. In the embodiment of FIG. 4A, light emitted by lightsource 130 in a first direction 420 (e.g., substantially downward) isreflected by the reflector-style light redirection element 410 to asecond direction 430 (e.g., substantially laterally). As such, when thelight redirection element 410 is positioned relatively near a lightsource (such as in the embodiment depicted in FIG. 1B), the luminaire400 acts to provide interlighting.

FIG. 4B illustrates an embodiment of a luminaire 440 having a lightredirection element 450 in the form of a total internal reflection (TIR)lens positioned near to a light source 130. In the embodiment depictedin FIG. 4B, light emitted by light source 130 in a first direction 460(e.g., substantially downwardly) is redirected by the TIR lens of thelight redirection element 450 to a second direction 470 (e.g.,substantially laterally). As such, when the light redirection element450 is positioned relatively near a light source (such as in theembodiment depicted in FIG. 1B), the luminaire 440 acts to provideinterlighting.

Although the embodiments illustrated in FIG. 4A and FIG. 4B show areflector and a TIR lens used as light redirection elements 410, 450, itshould be understood that in other embodiments any suitable lightredirection element may be used.

FIG. 5 is a flowchart illustrating a method 500 for top lighting andinterlighting using a luminaire (such as the luminaire 108 depicted inFIGS. 1A and 1B) with a movable light source in accordance with anexemplary embodiment of the present disclosure. The method 500 includessteps 510-540. In step 510, a light source is positioned at a firstvertical position and the light redirection element is positioned at afirst vertical distance from the light source at a first time. In one ormore embodiments, a movement mechanism simultaneously or stepwise movesthe light source at a first vertical movement rate and the lightredirection element at a second vertical movement rate. In particularembodiments, the movement mechanism is separately coupled to the lightsource and the light redirection element.

In step 520, light from the light source is directed to an object at afirst emission direction. In step 530, the light source is positioned ata second vertical position and the light redirection element ispositioned at a second vertical distance from the light source at secondtime. In step 540, light from the light source is redirected to theobject at a second emission direction using the light redirectionelement.

One or more embodiments described herein provide for top lighting andinterlighting luminaire assemblies with movable light sources forinterior plant growth stimulation. One or more embodiments may providefor an advantage allowing a luminaire to be positioned at any desiredposition to allow for top lighting and interlighting from a singleluminaire without requiring a separate top lighting luminaire and aninterlighting luminaire. Another advantage that may be provided by oneor more embodiments is enabling a more uniform inter-canopy lightdistribution of light emitted by the luminaire. Advantageously, as aresult of this disclosure, a single luminaire may be utilized year roundto add top lighting when the sunlight level is low as well as provideinterlighting when the sunlight level is high, since it is desirable toprovide a top lighting and interlighting luminaire assembly with movablelight source for greenhouse or interior plant growth stimulation.

As will be understood by those familiar with the art, the presentdisclosure may be embodied in other specific forms without dependingfrom the spirit or essential characteristics thereof. Accordingly, thedisclosures and descriptions herein are intended to be illustrative, butnot limiting, of the scope of the disclosure which is set forth in thefollowing claims.

1. A lighting system, comprising: a light source; a light redirectionelement; and a movement mechanism coupled to the light source and to thelight redirection element, the movement mechanism configured to move thelight source and the light redirection between (i) a first orientationin which the light redirection element is positioned apart from thelight source such that light from the light source is emitted in a firstemission direction, and (ii) a second orientation in which the lightredirection element is positioned near the light source such that lightemitted by the light source is emitted in a second emission direction.2. The lighting system of claim 1, wherein the movement mechanism isconfigured to move the light source at a first vertical movement rateand the light redirection element at a second vertical movement rate. 3.The lighting system of claim 1, wherein the first orientation is a toplighting orientation and the second orientation is an interlightingorientation.
 4. The lighting system of claim 1, wherein the movementmechanism is further configured to move the light source and the lightredirection element in a stepwise fashion.
 5. The lighting system ofclaim 1, the movement mechanism further comprising: a motor; a shaftcoupled to the motor; a first wheel coupled to the shaft, the firstwheel further coupled to the light source; and a second wheel coupled tothe shaft, the second wheel further coupled to the light redirectionelement.
 6. The lighting system of claim 5, wherein a diameter of thefirst wheel is greater than a diameter of the second wheel.
 7. Thelighting system of claim 1, wherein the first vertical movement rate isgreater than the second vertical movement rate.
 8. The lighting systemof claim 1, wherein the light source is at least a first light emittingdiode (LED).
 9. The lighting system of claim 1, wherein the lightredirection element includes at least one of a reflector and a lens. 10.The lighting system of claim 1, wherein the light in the first emissiondirection is directed substantially to a top surface of an object. 11.The lighting system of claim 1, wherein the light in the second emissiondirection is directed substantially to a lateral surface of an object.12. A method for top lighting and interlighting using a luminaire,comprising: simultaneously or stepwise moving, by a movement mechanism,a light source at a first vertical movement rate and a light redirectionelement at a second vertical movement rate, the movement mechanism beingseparately coupled to the light source and the light redirectionelement; positioning, at a first time, the light source at a firstvertical position and the light redirection element at a first verticaldistance from the light source to direct light from the light source toan object at a first emission direction; positioning, at second time,the light source at a second vertical position and the light redirectionelement at a second vertical distance from the light source to directlight from the light source to the object at a second emission directionusing the light redirection element.
 13. The method of claim 12, whereinthe first vertical movement rate is greater than the second verticalmovement rate.
 14. The method of claim 12, wherein the first verticaldistance is greater than the second vertical distance.
 15. The method ofclaim 12, wherein the light source comprises at least a first LED. 16.The method of claim 12, wherein the light redirection element includesat least one of a reflector or a lens.
 17. The method of claim 12,wherein the light in the first emission direction is directedsubstantially to a top surface of the object.
 18. The method of claim12, wherein the light in the second emission direction is directedsubstantially to a lateral surface of the object.
 19. A lighting system,comprising: a light source; a light redirection element; and a movementmechanism coupled to the light source and the light redirection element,the movement mechanism configured to simultaneously or stepwise move thelight source and light redirection element to two set positions, wherethe distance between the light source and the redirection elementchanges between the two set positions.